Process of making cushion vehicle-tires.



J. A. MAQMILLAN.

PROCESS OF MAKING CUSHION VEHICLE TIRES. APPLICATION FILED APR. 26, 1909.

96565.@3 Il Patented Aug. 2, 1910.

PROQESS OF MAKL'NG- CUSHION VEHICLE-TIRES.

Specieaton of Letters Patent. Application filed April 26, 1909.

to the exibility of the tire, the segmental sectional pieces are preferably removed by being pulled out of the tire inwardly and radially. It should be understood that a hollow cellular space is produced by each 60 one of the transverse segmental sectional pieces, of the former, the first step of the process producing a core of cellular resilient material.

The transverse sections of the tire are 65 preferably perforated or slitted as shown, and are generally formed of undercured rubber which, after vulcanization, becomes practically homogeneous with the rest of the tire fabric.

ln the drawings l represents the former;

966,@31. Patented Aug. 2, 1910.

Serial No. 492,150.

To all whom it may concern:

Be it known that I, JOHN il. MACMILLAN, a citizen of the United States, and resident of the city of Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Processes for Matting Cushion Vehicle-Tires, of: W'hich the follotvi g isa specification. y

The present invention relates to a process for making cushion vehicle tires.

In carrying out my process, l prefer to use an annular former upon which are cirv cumferentially arranged and placed at intervals, a number of sectional pieces attached to a holding' device. These sectional pieces are attached preferably to segmental separable bases of annular form. The

masses of resilient material such rubber v re placed between the radially circun'iferential sectional pieces. Over these alternately interspaced masses of rubber andsectional pieces are formed strips of fabric and rubber Which are circumferentially placed over and around said masses audscctional pieces and the tire built up after the manner of Q, the segmental sectional pieces of the former; the holding rings; 4, transverse bridges or columns; 5, cellular spaces between the columns; 6, the clencher rim; 7, open spaces in the base of the clencher rim interrupted by columns 5; 8, the tire tread; 9, strips of fabric and rubber forming the outer circuinferential casing; 10, slits in the columns 5, and ll, the sectional pieces on the segmental sections 2 of the former l.

l claim:

l. The process of making tires, which consists in first placing resilient material in the form of a cellular core upon a sectional 85 forn'ier detachable from the completed core, then building up over such formed core a tread structure of strips of fabric and resilient u'iatm'ial, then placing a mold over the core and strips, then vulcanizing the tire, 90 and finally removing thc sectional former.

2. The process of making tires which consists in first placing at intervals resilient material transversely of the core upon a sectional former detachable from the com 95 pleted core, then building up over such formed core a tread structure -of strips of fabric and resilient material, then placing a mold over the .core and strips, then vulcaniztire casings or shoes of pneun'iatie tires.

ln the drawings Figure l represents a side elevation of a portion of an annular former having, preferably at regular intervals, transverse circumferentially arranged sectional pieces. Fig. 2 is a detail transverse elevation and section of one of the sectional pieces of the annular former. Fig. 8 is a cross section of the tire. Fig. 4. is a plan of a portion of the interior face of one of the tires.

One method of carrying out my improved process consists in placing masses of rubber 40 within the spaces between thel sectional pieces so as to bridge at intervals the transverse diameter of the completed tire, and thereby form interspaced columns; and then to build up the outer casing or shoe (including the beads, if a clencher rim is desired) ing the tire, and Hnally removing the Sec- 1,06

by successively placing longitudinally over tional former. the masses of rubber and the sectional 3. The p'rocess of making tires Whichpconpieces, strips of rubber and fabric until the 'sists in first placing columns of rubberseptire is built up into the'linal desired shaper arably upoii'a sectional former, then build-I and form. The )liasses of rubber and the ing up o\f'c1"-such columns a tread structure 10i circumferential strips of rubber and fabric of strips ot' fabric and rubber over and are generally adhesive and are molded into connecting the columns, then placing a mold one compat;t form before vulcanizing. Afte' over the fabric and rubber, then vulcanizthe tire is completely molded and formed, ing the Whole, and finally removing the .it is vulcanized. After vulcaniaation, owing sectional former. llt

4l. The process of making tires, which conrubber, then vulcanizing the whole, and silsts in first slitting columnsf rubber, then finally removing the sectional former. p acing Such columns separa ly u on a sectional former, then building up lVer such JOHN A' MACMILLAN' 5 columns a trearl Structure of Strips of fabric VVit-nesses:

and rubber over` and connecting the columns, K. H.` FINCH,

then placing a mold over 'the fabric and f WALTER T. ELLIOTT. 

